Section 7 2D Domains

This chapter of the Manual discusses features specifically related to 2D model domains. 1D domain features are discussed separately in Chapter 5 and 1D/2D linking is discussed in Chapter 10.

7.1.1 TUFLOW HPC 2D Solver

7.1.2 TUFLOW Classic 2D Solver

7.1.3 Cell Schematisation

7.1.3.1 Computational Points

7.1.3.1.1 ZC Point

7.1.3.1.2 ZU and ZV Points

7.1.3.1.3 ZH Point

7.1.4 Turbulence

7.1.4.1 Dry Wall Treatment

7.2 Common Functionality

7.2.1 Defining the Domain

7.2.2 Active / Inactive Cells

7.2.3 Data Layering

7.2.4 Sampling of Data Sets

7.2.4.1 Traditional Sampling Approach

7.2.5 Elevations

7.2.5.1 Direct Reading of DEM Grids

7.2.5.2 Z Shape Layers (2d_zsh)

7.2.5.2.1 Order of Processing

7.2.5.2.2 Examples

7.2.5.3 Variable Z Shape Layer (2d_vzsh)

7.2.5.4 3D TIN Layers (2d_ztin)

7.2.5.5 3D Breakline Layers (2d_zln)

7.2.5.6 Zpt Layers (2d_zpt)

7.2.5.7 Using Multiple Layers and Points Layers

7.2.5.7.1 Point Only Layers

7.2.6 Land Use (Materials)

7.2.6.1 Bed Resistance

7.2.6.2 Log Law Depth Varying Bed Resistance

7.2.6.3 Materials File

7.2.6.3.1 .csv Format

7.2.6.3.2 .tmf Format

7.2.6.4 Rainfall Losses

7.2.7 Infiltration

7.2.7.1 Infiltration Layer

7.2.7.1.1 Green-Ampt (GA)

7.2.7.1.2 Horton (HO)

7.2.7.1.3 Initial Loss/Continuing Loss (ILCL)

7.2.7.2 Soils File (.tsoilf)

7.2.8 Hydraulic Structures

7.2.8.1 Introduction

7.2.8.2 2D Bridge Structures (2d_bg)

7.2.8.2.1 Automatic Generation of Superstructure FLC

7.2.8.3 Layered Flow Constrictions (2d_lfcsh Layers)

7.2.9 Cell Modification

7.2.9.1 Storage Reduction (2d_srf)

7.2.9.2 Cell Width Factor (CWF)

7.2.9.3 Form Loss Coefficient (FLC)

7.2.9.4 Modify Conveyance

7.2.10 Modelling Urban Areas

7.2.10.1 Buildings

7.2.10.3 Fences and Walls

7.3 TUFLOW HPC Specific

7.3.1.1 Quadtree .tcf Commands

7.3.1.2 Quadtree Control File (.qcf) – Mandatory Commands

7.3.1.3 Quadtree Control File (.qcf) – Optional Commands

7.3.1.4 Defining Grid Refinement Polygons

7.3.2 HPC Turbulence

7.3.2.1 Overview

7.3.2.2 Constant Eddy Viscosity

7.3.2.3 Smagorinsky Approach

7.3.2.4 Wu Approach

7.3.3 Sub-Grid Sampling (SGS)

7.3.3.1 SGS Methodology and Commands

7.3.3.1.1 SGS Sample Distance

7.3.3.1.2 SGS Topographic Updates

7.3.3.1.3 Advanced SGS Commands

7.3.3.2 SGS Output Options

7.3.3.2.1 Check Files

7.3.3.2.2 Map Outputs

7.3.3.2.3 High-Resolution Outputs

7.3.4 2D Upstream Controlled Flow (Weirs and Supercritical Flow)

7.3.5 Infiltration and Groundwater Flow

7.3.5.1 Infiltration

7.3.5.1.1 SCS Curve Number (SCS)

7.3.5.2 Groundwater Flow

7.3.5.2.1 Horizontal Advection

7.3.5.2.2 Convective Flow Layers (CO)

7.3.5.2.3 Unsaturated Groundwater Flow

7.3.5.2.4 Implementation

7.3.5.2.5 Soil Type

7.3.5.2.6 Soil Thickness

7.3.5.2.7 Drying of Top Groundwater Layer

7.3.5.3 HPC Soils File (.tsoilf)

7.3.6 Non-Newtonian Flow

7.3.6.1 Implementation

7.3.6.2 Non-Newtonian Mixing

7.3.7 Unsupported Features in TUFLOW HPC

7.4 TUFLOW Classic Specific

7.4.1 Classic Turbulence

7.4.1.1 Constant

7.4.1.2 Smagorinsky

7.4.2 2D Upstream Controlled Flow (Weirs and Supercritical Flow)

7.4.3 Land Use (Materials)

7.4.4 Multiple 2D Domain

7.4.5 Coriolis Term

7.4.6 Legacy Structures

7.4.6.1 2D Flow Constrictions (2d_fcsh and 2d_fc)

7.4.6.2 Applying Form (Energy) Loss in 2D FC and FCSH Layers

7.4.7 Unsupported Features in TUFLOW Classic